Step 1: On Home screen, drop down Status bar at top right, touch USB Connection Settings.

Step 2: Check USB debugging option.

Step 3: Tap OK to finish settings.

B) Lenovo Tablet:Step 1: Tap Settings on Home screen, then tap About tablet.Step 2: Tap Build number for seven times or more, Developer options will show up on Settings menu at left.Step 3: Tap Developer options, and tap USB debugging at right.Step 4: Tap OK to finish settings.

Note: If your device not support Lenovo smart assistant you try alternative driver from download package.